/*
**
**  Swift/XRT light curve for Mrk 421.
**
**  Data taken from the automatic processing at http://www.swift.psu.edu/monitoring/
**
**  When using these data and results in publications, please reference M.C. Stroh & A.D. Falcone 2013, ApJS, 207, 28; arXiv: 1305.4949.
**
**  Key:
**
**   BinCenter      - Center of time bin (MJD)
**   BinHW          - One-half of the full time bin size (days)
**   Rate           - The background subtracted, PSF corrected and pile-up corrected source count rate (cts/s).
**   RateError      - 1 sigma error in source count rate (cts/s)
**   FracExp        - Conversion factor between bin size and observing time
**   Mode           - 0 if in Windowed Timing (WT)
**                    1 if in Photon Counting (PC)
**
**
**  Upper limits have an error listed as -1.00000.
**
*/
      BinCenter          BinHW           Rate      RateError        FracExp  Mode
   54973.851645       0.000312       20.58696        0.66354        1.00000     0
   54973.852291       0.000333       19.13907        0.62239        1.00000     0
   54973.852950       0.000327       19.98159        0.64189        0.98228     0
   54973.853601       0.000324       19.63490        0.63836        1.00000     0
   54973.854403       0.000477       20.50735        0.53466        0.99644     0
   54973.893821       0.000440       17.92393        0.58119        0.99962     0
   54973.894689       0.000428       17.10339        0.55892        1.00000     0
   54973.895523       0.000405       18.22316        0.58528        1.00000     0
   54973.896313       0.000385       18.98647        0.61246        1.00000     0
   54973.897314       0.000616       18.17150        0.47589        0.99718     0
   54973.909385       0.000443       21.91995        0.71383        0.99436     0
   54973.910242       0.000414       22.06207        0.71646        1.00000     0
   54973.911058       0.000402       22.60357        0.73370        1.00000     0
   54973.911868       0.000408       22.49345        0.72869        1.00000     0